Leonard and Sheldon in “The Hofstadter Insufficiency”

Leonard

[on phone on deck of ship in storm] Sheldon! It's not a great time. What do you want?

Sheldon

Hello to you too. I'm sorry, but this is important.

Leonard

What is it?

Sheldon

Back to the Future 2 was in the Back to the Future 3-case, and Back to the Future 3 was, get this, in the Back to the Future 2-case.

Leonard

SO?!

Sheldon

So... Did you do that or am I in the house with an intruder?

Leonard

Sheldon, I've got to go inside. It's getting rough out here.

Sheldon

You're dodging the question. I knew it was you. What was that?

Leonard

What was what?

Sheldon

This isn't a very good connection, but it sounded like someone just released a kraken.

Leonard

Okay, I'm hanging up now. You know there is no such thing as a kraaaa...